9. I used to ride a bike to visit my grandma when I was a child. / I rode a bike to visit my grandma when I was a child. (QKĐ, dấu hiệu: when I was a child, used to + Vbare: đã từng, dùng cho quá khứ, cấu trúc QKĐ: S + Ved/V2)

10. There used to be traffic jams in rush hour in my home town. (used to + Vbare: đã từng, are chuyển về thể nguyên là be)

11. Although there was an accident last night, everyone was fine. (QKĐ, dấu hiệu: last night, Although + S + V, S + V)

12. It is important to obey traffic rules when we use the road. (It is important + to V: nó quan trọng để...)

13. Did you use to go to the beach when you lived in Nha Trang? (QKĐ, câu hỏi used to, mượn trợ động từ did, câu trúc: Did + S + use to + Vbare?)

14. Have you ever watched a horror movie? (HTHT, dấu hiệu: ever, câu hỏi đã xảy ra chưa: Have you ever + Vbare: bạn đã bao giờ làm...?)

15. There was an interesting documentary on television last night. (QKĐ, dấu hiệu: last night)

16. In spite of being a poor student, Tom studied very well. (In spite of + N/Ving, S + V: mặc dù)

17. Christmas is one of the most famous religious festivals in the world. (so sánh nhất tính từ dài, tobe + (one of the most) the most + Adj)

18. Vietnamese people prepare Tet by cleaning their houses and cooking traditional special food. (HTĐ, prepare sth by + Ving: chuẩn bị thứ gì đó bằng cách)

19. They will be making their presentation this time tomorrow morning. (TLTD, dấu hiệu: this time tomorrow morning, S + will be + Ving)

20. Biogas will be used for cooking and heating next month. (bị động thì TLĐ, dấu hiệu: next month, chủ ngữ là vật, S + will be + V3.., will be used for doing sth: sẽ được sử dụng để)